#include <iostream.h>
#include <math.h>
using namespace std;
int main()
{
float m,h;
float g = 9.8;
float e, h0,t;
cout << "Введите Еп: ";
cin >> e;
cout << "\n";
cout << "Введите h0: ";
cin >> h0;
cout << "\n";
cout << "Введите m: ";
cin >> m;
cout << "\n";
h = e/m*g;
t = sqrt(2*(h-h0)/g);
cout << "t = " << t << endl;
return 0;
}